Valid CPF generator

How to generate a valid CPF

Set how many you want (from 1 to 1000), choose whether the output is formatted — 295.379.955-93 — or just the eleven digits, and click Generate. Each number is drawn at random in the first nine positions and closed with two check digits computed by the Modulo 11 algorithm, the same one Receita Federal uses. Copy the whole batch at once or download it as JSON, CSV and SQL INSERT statements with the table name of your choice — ready to seed a staging database.

If you need more than the number itself, the full test-record mode assembles fictional Brazilian records with name, email, phone, postal code and date of birth alongside the CPF. None of it leaves your machine: generation happens entirely in the browser, with no document sent to or stored on CodeCrush servers.

CPF by state: what the 9th digit reveals

A CPF is not entirely random. The ninth position — the digit right before the two check digits — identifies the Receita Federal fiscal region where the document was issued. That is why the generator lets you pick the state: it fixes the correct digit in that position and returns a CPF consistent with it, which matters when your system has region-specific business rules, routing or reporting.

A valid CPF is not the same as an existing CPF

This distinction is the source of half the confusion about CPF generators. A valid CPF is merely a number whose check digits satisfy the Modulo 11 maths — that is what this tool produces and what virtually every form checks. An existing CPF is a number actually registered and active in the Receita Federal database, tied to a person. The documents generated here are valid and not existing; no public tool can tell you whose a CPF is, because that requires restricted access to the Receita database.

The Validate CPF tab opens that black box: for whatever number you type, it shows each multiplication by weight, the sum, the remainder of the division by 11 and the expected digit. It is the fastest way to understand why a CPF passes or fails — and to check that your own implementation is right.

When to use it (and when not to)

• Testing sign-up form validation in development and QA;
• Seeding staging databases with realistic fixtures, via the SQL export;
• Writing automated tests that need valid, varied CPF numbers;
• Checking that your validator rejects cases such as 111.111.111-11;
• Demoing a product without exposing any real customer's document.

What is off limits: using a generated document to sign up for a real service, to commit fraud or to impersonate someone. That is a crime under articles 171 and 299 of the Brazilian Penal Code, and no test case justifies it.

Need a CNPJ as well?

Use the CNPJ generator, which covers the numeric format and the new alphanumeric one introduced in 2026, and also looks up real company data in the Receita Federal registry. If what you want is to generate CPF and CNPJ in bulk on one screen, with full fictional records and SQL export, the combined version does both at once.